Crossword Genius

Vehicle turned up to provide weapons and support for a ship (7)

Ross

I believe the answer is:

yardarm

I'm a little stuck... Click here to teach me more about this clue!

'weapons and support for a ship' is the definition.
I can't judge whether this defines the answer.

'vehicle turned up to provide' is the wordplay.
'vehicle' becomes 'dray' (type of cart).
'turned up' is a reversal indicator.
'to' means one lot of letters go next to another.
'provide' becomes 'arm' (arming is a kind of providing).
'dray' back-to-front is 'yard'.
'yard'+'arm'='YARDARM'

Can you help me to learn more?

(Other definitions for yardarm that I've seen before include "First drink, when sun over it" , "part of ship" , "Hanging place on board old ships" , "Either end of a sail beam" , "Ship's beam" .)

I've seen this clue in The Telegraph.
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